A Five-Year Study of Potential Western Corn Rootworm Resistance to Diazinon and Phorate in Nebraska1

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Abstract:

Starting in 1963 adults of the western corn rootworm, Diabrotica virgifera Le Conte, were collected annually from 18 sites in Nebraska and treated to determine LD30 levels for diazinon and phorate. Dosage-mortality curves and LD30 values are presented for both insecticides for 1963 through 1967. The LD30 values for both diazinon and phorate have increased significantly since 1963. Control of the western corn rootworm with both insecticides remains effective, but the increasing LD30 values should alert entomologists to possible failures in the field.

Document Type: Research Article

Publication date: April 1, 1968

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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